/Engine/Source/Editor/SkeletonEditor/Public/SkeletonTreeBuilder.h
Apply filtering to the tree items
virtual void Filter ( const [FSkeletonTreeFilterArgs](API\Editor\SkeletonEditor\FSkeletonTreeFilterArgs) & InArgs, const [TArray](API\Runtime\Core\Containers\TArray)< [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< class [ISkeletonTreeItem](API\Editor\SkeletonEditor\ISkeletonTreeItem) >> & InItems, [TArray](API\Runtime\Core\Containers\TArray)< [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< class [ISkeletonTreeItem](API\Editor\SkeletonEditor\ISkeletonTreeItem) >> & OutFilteredItems )